Anybody can be a family office today. It used to be that a family office existed for ultra wealthy families with at least $100 million of net worth, because that justified the operational costs of hiring staff and setting up the structure. That has changed.
We now see affluent families worth $50 million giving it a go, and technology is helping tremendously. The term keeps stretching, so before choosing among the family office types, it helps to know what the actual options are.
This guide covers the main types of family offices, the different flavors inside each family office model, how offices evolve across multiple generations, and a practical way to choose the right family office structure.
It comes from what we see across 83 family offices we analyzed ranging from roughly $30M to $5B+ in assets under management.
Family Office Types at a Glance
Type | Who it serves | How it runs | Typical cost profile |
Embedded family office | One family | Inside the family business, using company staff and systems | Absorbed by the business |
Virtual family office | One family | Fully outsourced advisors coordinated through shared technology | Variable, pay per service |
Dedicated single family office | One family | Dedicated in-house team, own systems and governance | Fixed, $1M+ per year |
Multi family office (four flavors below) | Multiple families | Shared team and infrastructure, each family is a client | Percentage of assets or flat fee |
Hybrid family office | One family | Small in-house team plus outsourced specialists | Mixed |
The Single Family Office (SFO) Family
A single family office serves one wealthy family. Within that definition, we see three distinct setups.
The embedded family office
The office lives inside the family business. The company CFO manages the family's personal affairs and financial affairs alongside corporate work, on the company's systems. Most family offices start here, because the people are already trusted and the marginal cost is low.
The problems come with growth: personal finances and business interests mix in the same books, staff costs need allocation between company and family, and a sale of the business removes the infrastructure the family runs on.
We have seen offices running family operations on a legacy oil and gas system inherited from the operating company, purely because that is what was there.
The virtual family office
The outsourced family office model. The family hands the functions to external providers: an outside CPA firm, an investment advisor, an estate attorney, a bookkeeper. Shared technology coordinates the multiple advisors instead of a shared office.
Costs stay variable, which is why this model opened family office capabilities to affluent families under $50 million. The coordination burden is real. One party has to keep the estate plan, the entity structure, the tax filings, and the books consistent with each other.
The dedicated single family office
A dedicated in-house team, hired for one family, running its own systems and governance. This is the traditional family office, the model people picture when they hear the term.
It delivers full control, privacy, and completely personalized services, and it costs the most: a senior leader, accounting staff, technology, office space, and compliance, with operational costs commonly at $1 million or more per year.
The classic threshold was $100 million in the family's assets. Complexity moves that number in both directions, and we cover why below.
The Multi Family Office (MFO) Family
A multi family office serves multiple families from shared infrastructure. The multi family office structure covers four different businesses, and the differences matter when you evaluate one.
The private practice at an accounting firm
CPA-led practices that focus on the accounting, the tax returns, and the bill pay. Strong on compliance and books, lighter on investments.
The administration firm
Firms that run the operational back office for their client families: bookkeeping, bill pay, reporting, coordination with outside advisors. Some manage 100 or more general ledgers across the families they serve.
The RIA-style multi family office
Private wealth management firms and investment advisors that adopted the family office label. They lead with portfolio management and wealth management strategies, and many do no accounting at all. If a firm calls itself a multi family office, ask directly whether it keeps books, pays bills, and produces consolidated reporting across the family's full balance sheet, or whether it manages the investable assets only.
The full-stack multi family office
Firms offering comprehensive services: investment management, accounting, tax planning, administration, lifestyle management. Fees commonly run as a percentage of assets or a flat annual fee.
The economics work through shared resources: families access professional expertise and institutional systems at a fraction of the cost of building a dedicated family office. Each family still gets its own reporting and strategy, and customization has limits, because the firm's processes have to work across many family offices at once.
In all four flavors, verify the same two things before signing: the complete service menu with the fee schedule in writing, and how the firm handles conflicts of interest, including how investment opportunities get allocated among the families it serves.
The Hybrid Family Office
Most real family offices land in between. A common setup: a dedicated team of two to four people owns accounting, bill pay, and coordination in-house, while investment management, tax preparation, and legal work go to outsourced specialists.
Functions that touch the family's wealth daily stay inside. Specialized or periodic work goes outside.
Our production data backs the "small team" part: across our client base, entity count spans roughly 200x from the smallest office to the largest, while team size barely moves, from about 5 seats at the small end to 8 at the largest.
How a Family Office Evolves
Type is a snapshot of how a family office works at one moment. Offices move through a typical arc: the operation starts inside a company, then gets extracted into its own structure, then serves one generation, then multiple generations and multiple family members.
By the end of that arc, the office has formal processes and family governance and serves dozens or hundreds of family members. At that stage, some people stop calling it a family office and start calling it a family enterprise office.
Two practical consequences follow. First, expect to change structures. Families commonly move from embedded to virtual, from virtual to hybrid, and from a multi family office to their own single family office as the family's wealth grows. Second, build for the move. Clean entity-level books, documented processes, and portable data make each transition a project instead of a crisis.
Family Office Services: What Family Offices Offer
The service list looks similar across every type. The structure determines who performs each service.
Wealth management. A full inventory of the family's assets and liabilities, tied to the family's goals. Wealth management services start from a consolidated balance sheet across every entity and account, and wealth preservation across generations is the usual mandate.
Investment management. Asset allocation, manager selection, direct and co-investment evaluation, risk management, and liquidity rules. An investment policy statement documents the investment objectives and who decides.
Tax planning. Tax-efficient entity structures, compliance across jurisdictions, and documented terms on arrangements between family entities. Tax strategies need clean entity-level books to work in execution.
Succession planning. A formal timeline, the trusts and estate-transfer instruments, and family governance: a family council, regular family meetings, and written decision rules sturdy enough to survive real family dynamics. Many offices coordinate charitable giving here as well, since philanthropy usually carries across future generations.
Lifestyle management. Bill pay, vendor oversight, property management, and concierge services for the family's personal affairs, with an explicit scope and budget.
Wealth education. Financial literacy programs for younger family members, grounded in the family's values, plus regular sessions where the next generation watches how decisions get made.
Complexity Matters More Than the Label
Here is the thing the standard taxonomy misses: accounting workload tracks complexity, and complexity tracks the structure of the wealth. We have clients with significant wealth in the billions doing straightforward work, with everything in-house and no outside investors.
We have clients worth $100 million running extremely complex operations, because they do a lot of co-investments, which means partnership accounting, capital accounts, and loans between entities.
The complexity drivers we see in practice:
Entity count. The median office on our platform keeps books for 10 legal entities. About half run 20 or more, and our largest client runs 224. Around 86% of our clients are multi-entity.
Entity variety. Roughly 64% of our clients mix three or more entity types in one book of record: LLCs alongside trusts alongside partnerships alongside individuals, often with real estate holdings and operating companies in the mix. Trust accounting alone is a different beast.
Investment style. Co-investments and partnerships create capital accounts and ownership percentages that change over time. Direct deals mean each vehicle carries its own books and its own ownership split.
Generations. Multiple generations typically mean many trusts, including generation-skipping trusts, and more family members who need reporting.
The right structure for a family office depends more on those four drivers than on net worth. A family with 5 entities and public securities can run a virtual model comfortably. A family with 30 entities, tiered ownership, and active partnerships needs dedicated capacity, whatever the label on the door says.
How to Choose
Three criteria cover most of the decision, and they come from watching many family offices get this right and wrong.
1. Does it cover 80 to 90% of your needs?
100% is impossible. List the three pain points that consume 80% of your team's time, and pick the structure and the providers that solve those. The remaining 10% gets figured out.
2. Will your team actually adopt it?
A structure or a system that takes a year to stand up fails, because the person driving it burns out before the payoff arrives. Ease of adoption beats completeness.
3. Do the people understand family offices?
For any provider, from a full-stack MFO to a software vendor, ask whether they have worked with other family offices like yours. Family office work has its own vocabulary and its own patterns, and generalists learn it on your budget.
Then do the standard homework: model total cost of ownership at your projected wealth five and fifteen years out, call references from families of similar size and complexity, and write the transition plan, including who owns the migration of historical financial data, before you commit.
The Accounting Layer Under Every Type
Every type in this guide produces the same underlying requirement: accurate books across multiple entities, consolidated on demand.
SumIt is a general ledger built specifically for that job. Our clients span embedded offices moving to standalone, virtual offices coordinating outside bookkeepers, dedicated single family offices, and multi family offices running books for dozens of client families.
All entities live in one login, inter-entity entries book both sides at once, and consolidation runs in a few clicks.
If you are choosing a structure or changing one, talk to us about the accounting side, or see how SumIt works for single family offices and multi family offices.
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